Product Information KM 100 Miniature Microphone System www.neumann.com Georg Neumann GmbH, Berlin Ollenhauerstr. 98 13403 Berlin Germany Tel.: +49 (30) 417724-0 Fax: +49 (30) 417724-50 E-Mail: headoffice@neumann.com, engineering@neumann.com, catalog-info@neumann.com Web: www.neumann.com
he variable condenser miniature microphone system consists of several active microphone capsules with different directional characteristics, an output stage, and numerous accessories. Currently there are seven active capsules available: omni diffuse-field equalized, omni free-field equalized, cardioid, wide-angle cardioid, cardioid with bass roll-off, hypercardioid, and figure-8. Through the modular construction of mic capsules and the output stage it is very easy to adapt the system to a wide range of applications. The mic becomes nearly invisible during work with cameras (film, video), on stage, or suspended from the ceiling in a concert hall. An active capsule can also be screwed directly onto the output stage. The result is a compact miniature microphone. Features Miniature microphones with 7 exchangeable capsules Active capsules, detachable up to 50 m from the output stage Great variability through capsule extensions and goosenecks Switchable 10 db preattenuation Set includes windshield and two different clamps Transformerless circuitry Extensive accessories Construction The microphones are only 92 or 110 mm resp. long and 22 mm in diameter. They consist of the condenser capsule and the output stage. Both parts can be unscrewed from each other. The system offers several condenser capsules with different directional characteristics. Numerous accessories can be mounted between the capsules and the output stage. The capsules attach to cables, capsule extensions, swivel mounts, table stands, goosenecks, stereo mounts, and hangers. Therefore, it is very easy to adapt the system to a wide range of applications. The active capsule itself is only 35 or 47 mm resp. long. The KM 100 output stage and the active microphone capsule may be separated by up to 50 m of interconnecting cable. These cables are 3 mm in diameter, and therefore very inconspicuous.
KM 100 Acoustic features AK 20 is a pressure gradient transducer with the figure-8 characteristic, realized with a single diaphragm. The diaphragm diameter is just 16 mm. All sound field components reach the diaphragm directly. This results in identical frequency response curves and output levels at 0 and 180 sound incidence. Corresponding accessories allow combining the AK 20 with other active capsules or microphones to obtain an MS-Stereo setup. AK 30 is a diffuse-field equalized pressure transducer with a flat frequency response up to 10 khz (in the diffuse field). In the free sound field this microphone has a boost of approximately 7 db at 10 khz. AK 31 is a free-field equalized pressure transducer with a flat frequency response up to 20 khz (in the free field). In the diffuse sound field this microphone has a high frequency rolloff above 5 khz. AK 40 is a pressure gradient transducer with cardioid characteristic. The frequency curves are very smooth and match 0 sound incidence. Sound from sources within a pickup angle of ± 135 is reproduced without any coloration. AK 43 is a pressure gradient transducer with wide-angle cardioid characteristic. Attenuation at 90 is 4 db, at 135 it is 8 db and at 180 it is 11 db. The frequency response curves for sound sources within an angle of ± 90 are parallel up to 12 khz. AK 45 is a pressure gradient transducer with cardioid characteristic, similar to the AK 40. However, it has an acoustic bass roll-off that is useful during applications when subsonic and low frequencies may cause difficulties. The AK 45 is optimized for a flat low frequency response at a recording distance of 15 cm ( speech cardioid ). AK 50 is a pressure gradient transducer with hypercardioid characteristic. Attenuation of sound incidence from the side or rear is about 10 db, with minimum sensitivity at an angle of 120.
Even with a long cable between active capsule and output stage, the signal is immune to external interference. Preattenuation The output stage has a 10 db switch. Attenuation is achieved by reducing the capsule voltage to one third. When the switch is on, the microphone is capable of accepting sound pressure levels up to 150 db without being overloaded. Connectors Electrical features The KM 100 is phantom powered (48 V) and uses transformerless output circuitry. This has several advantages. It features high output capability and extremely low self noise. It provides exceptionally clean sound, free of any coloration. As with traditional transformers, this circuit approach ensures good common mode rejection. The balanced output signal is protected against interference. The construction is extremely compact. The entire microphone circuitry is on a single hybrid module measuring only 2 cm² in area. It is built into the microphone capsule, therefore the term active capsules. All sensitive components are protected within the capsule. As a result, the quality of the audio signal is never compromised through the use of accessories, for example, when the capsule is detached from the output stage and mounted on a cable or a gooseneck. To diminish the number of connectors within the KM 100 System some accessories were modified. They can now be screwed directly onto the KM 100 output stage without using the KA 100 cable adapter. The new accessories which include the cable adapter, were renamed adding the suffix KA. For example: LC 3 is now LC 3 KA. The separate KA 100 cable, needed for older accessories, will be available also in future. The KM 100 output stage has a 3-pin XLR connector. Sound diffraction sphere The SBK 130 sound diffraction sphere slips onto the front of the KM 130/KM 131 pressure microphones. The diaphragm becomes an integral part of the surface of the sphere. This affects the frequency response of the microphones. While sounds coming from the front-half space are emphasized by up to 2.5 db between 2 khz and 10 khz, sounds arriving from the rear-half space are attenuated by a maximum of 2.5 db in the range above 5 khz. Since the sound diffraction sphere causes the pressure buildup of the KM 130/KM 131 pressure microphones to begin earlier, the frequency response rises smoothly in the middle and upper range. This is similar to a typical pressure gradient microphone, where the directivity increases with rising frequencies. However, since the KM 130/KM 131 are pressure microphones, they maintain a linear sensitivity down to the lowest frequencies.
KM 100 This changing directivity allows to record at a greater distance from the sound source, and makes the KM 130/KM 131 microphones especially suited as stereo main microphones in A-B configurations. KM 100 F Output stage The KM 100 F output stage is an alternative to the KM 100 output stage. In contrast to the KM 100 output stage with a flat frequency response, the KM 100 F attenuates frequencies below 80 Hz at 6 db/octave. This eliminates or suppresses interference caused by wind or structure-borne noise. A built-in slide switch allows to raise the cutoff frequency (-3 db point) from 80 Hz to 120 Hz. An additional slide switch lowers the sensitivity by 10 db. Stereo recordings By means of the AC 30 adapter cable two active capsules, AK 20 and e.g. AK 40 can be connected as MS stereo pair directly with the MTX 191 (A) matrix amplifier. The XY or MS signal is then available at the 5-pin XLR output connector of the MTX 191 (A), and the recording angle can be electrically remote controlled. The output stages KM 100 are then not required. Stereo set The cardioid and hypercardioid microphones are also available as complete stereo sets, SKM 140 and SKM 150, including all accessories in a single jeweler's box. A further SKM 100- MS Stereo Set containing the microphones KM 120 and KM 140 is available. 5
Current: KM 100 Output stage KA 100 Cable adapter LC 3 Microphone cable New: LC 3 KA Microphone cable KM 100 Output stage Accessories* AK 20, Active capsule Catalog No.: 71659 AK 30, Active capsule Catalog No.: 69001 AK 31, Active capsule Catalog No.: 69002 AK 40, Active capsule Catalog No.: 69007 AK 43, Active capsule Catalog No.: 69014 AK 45, Active capsule Catalog No.: 69015 AK 50, Active capsule Catalog No.: 69016 KA 100, Cable adapter Catalog No.: 07330 KM 100, Output stage Catalog No.: 07395 KM 100 F, Output stage Catalog No.: 07376 SBK 130, Sound diffraction sphere for dia. 22 mm, Catalog No.: 07371 BS 48 i, Battery supply Catalog No.: 06494 BS 48 i-2, Battery supply Catalog No.: 06496 N 248, Power supply EU: Catalog No.: 08537 US: Catalog No.: 08538 UK: Catalog No.: 08539 IC 3 mt, Microphone cable Catalog No.: 06543 Extension cable LC 2, 10 m, Catalog No.: 06690 Microphone cable LC 3 KA, 5 m, Catalog No.: 08408 LC 3 KA, 10 m, Catalog No.: 08409 DS 21 mt, Double mount Catalog No.: 06798 DS 100-1, Double swivel mount (for KVF... extension tubes) Catalog No.: 08491 DS 120, Double mount Catalog No.: 07343 *) Detailed descriptions of all accessories are contained in the accessories catalog. 90
AK.. Active capsule KM 100 AK.. Active capsule EA 2124 A mt, Elastic suspension Catalog No.: 08433 KVF 118 KA, Capsule extension (with gooseneck, 300 mm) Catalog No.: 08410 KVF 158 KA, Capsule extension (with gooseneck, 700 mm) Catalog No.: 08411 KVFF 148 KA, Capsule extension (with double gooseneck, 700 mm) Catalog No.: 08412 MF 2, Table stand (with rubber mounted thread) Catalog No.: 07266 MF 3, Table stand Catalog No.: 07321 MF 4, Table stand Catalog No.: 07337 MF 5, Table stand Catalog No.: 08489 MA, Microphone fishpole Catalog No.: 06771 MF-AK Table Stand (with Swivel Joint) Catalog No.: 08453 MNV 21 mt Auditorium hanger with clamp for KM... Catalog No.: 06802 MNV 87 mt, Auditorium hanger (with threaded adapter) Catalog No.: 06806 MNV 100, Auditorium hanger (with clamp for AK...) Catalog No.: 06811 SG 21/17 mt Swivel mount (with 21 mm and 17 mm clamp) Catalog No.: 06149 SG 100, Swivel mount (for KVF...) Catalog No.: 06688 SG 100-1, Swivel mount Catalog No.: 08490 SG-AK Swivel Mount Catalog No.: 08452 SGE 100, Swivel mount for MF 2 (with rubber mounted thread for AK...) Catalog No.: 06742 SMK 8 i, Gooseneck Catalog No.: 06181 *) Detailed descriptions of all accessories are contained in the accessories catalog.. 91
Accessories SMK 100 KA, Gooseneck (with cable, 160 mm) Catalog No.:08413 SMK 100-2 KA, Double gooseneck (with cable, 160 mm) Catalog No..: 08414 PS 15, Pop screen Catalog No.: 08472 STH 100, Stereo mount (for 2xAK... with LC 3) Catalog No.: 07315 Stand extension STV 4, Catalog No.: 06190 STV 20, Catalog No.: 06187 STV 40, Catalog No.: 06188 STV 60, Catalog No.: 06189 TF 221 c, Table flange (with rubber mounted thread) Catalog No.: 07278 Windscreen, 45 mm WNS 100 blk., Cat. No.: 07323 WNS 100 red, Cat. No.: 07324 WNS 100 grn, Cat. No.: 07325 WNS 100, yel, Cat. No.: 07326 WNS 100, blu, Cat. No.: 07327 WS 100, Windscreen, 90 mm Catalog No.: 06751 SR 100, Stand tube Catalog No.: 07336 and KA 100, Catalog No.: 07330 Special Accessories for AK 20 and Stereo-Applications DA-AK, Elastic suspension for two AK... Catalog No.: 08419 DA-KM, Elastic suspension for two KM... Catalog No.: 08420 WKD-AK, Windscreen for DA-AK Catalog No.: 08423 WKD-KM, Windscreen for DA-KM Catalog No.: 08424 STH 120, Stereo mount for AK 20 and e.g. AK 40 Catalog No.: 08422 WJ-AK, Windjammer for WKD-AK Catalog No.: 08425 WJ-KM, Windjammer for WKD-KM Catalog No.: 08426 WNS 120, Windscreen for AK 20 Catalog No.: 08427 AC 30, Adapter cable for connection of 2 AK... with MTX 191 (A), Catalog No.: 08418 MTX 191 A, Matrix amplifier Catalog No.: 07331
KM 100 Application Hints For recording situations where the microphone must remain invisible. KM 120 MS-Stereo microphone (in combination with the KM 140) Two crossed AK 20s in Blumlein technique Inconspicuous spot microphone with optimum attenuation of lateral sound sources Single microphone for two speakers facing each other KM 130 Ideal as AB stereo pair in the diffuse sound field because of the flat frequency response As a main mic, especially for capturing room acoustics For stereo recordings with a baffle plate As a spot mic for piano, wind instruments, organ, and choir KM 131 For close miking of instruments when there is no need to attenuate extraneous noise, and in a balanced acoustic environment to record acoustic guitar, wind instruments, strings, percussion, and drums Flat frequency response for close miking, spot mic KM 140 Universal usage, especially in situations when it is necessary to attenuate sound coming from adjacent instruments As XY and ORTF stereo pair Announcer s mic for broadcasting Spot mic, overhead Close miking of strings, wind instruments, percussion, piano, Leslie speakers, guitar amps We recommend using an additional windscreen to minimize the effects of high wind velocity KM 143 Polar response characteristic acts more like an omni. Therefore, it is an ideal tool to record larger instrument ensembles As AB stereo pair, especially in rooms with less than ideal acoustics As spot mic for strings, wind instruments, percussion, and Leslie speakers Acts very neutral when used close up to bass instruments, such as double bass, bass amps, guitar amps KM 145 It naturally compensates for proximity effect Very neutral tonal balance during close miking of speech, as in TV, movie and video, PA Acts very neutral when used close up to bass instruments, such as double bass, bass amps, guitar amps, Leslie speakers, toms KM 150 As XY stereo pair Overhead, toms In situations that are susceptible to acoustic feedback To attenuate unwanted sound of nearby instruments Recording of speech, as in TV, movie and video productions, PA systems Produces especially warm and bass supporting sound for artists who perform in proximity effect range We recommend using an additional windscreen to minimize the effects of high wind velocity, and plosive sounds These are just some of the most common applications. Detailed hints are described in the catalog KM 100 Application Guide. Delivery Range KM... Microphone KM 120... KM 150 Windscreen WNS 100 or WNS 120 Stand mount swivel SG 21/17 Wooden box Delivery Range SKM 140 (150) 2x Microphones KM 140 (150) 2x Connecting cables LC 3 KA 1x Stereo mount STH 100 Wooden box Delivery Range SKM 100-MS 1x Microphone each KM 120 and KM 140 2x Connecting cables LC 3 KA 1x Stereo mount STH 120, Wooden box Catalog No. KM 120... blk... 008417 KM 130... blk... 007051 KM 131... blk... 007061 KM 140... blk... 007031 KM 143... blk... 007109 KM 145... blk... 007068 KM 150... blk... 007077 SKM 140... blk... 007094 SKM 150... blk... 007099 SKM 100-MS... blk... 008421
KM 120 measured in free-field conditions (IEC 60268-4), tolerance ±2 db KM 130 KM 131 KM 140 KM 143 KM 145
KM 100 KM 150 KM 130 with SBK 130 KM 131 with SBK 130 Technical Data KM 120 KM 130 KM 131 KM 140 KM 143 KM 145 KM 150 Acoustical operating principle... Press. grad.... Pressure... Pressure... Press. grad.... Press. grad.... Press. grad.... Press. grad. transducer transducer transducer transducer transducer transducer transducer Directional pattern... Side-fire... Omni... Omni... Cardioid... Cardioid... Cardioid... Hyperfigure-8 diffuse field free field wide angle low frequency cardioid equalized equalized roll-off Frequency range... 20 Hz to... 20 Hz to... 20 Hz to... 20 Hz to... 20 Hz to... 20 Hz to... 20 Hz to 20 khz 20 khz 20 khz 20 khz 20 khz 20 khz 20 khz Sensitivity at 1 khz into 1 kohm... 12 mv/pa... 12 mv/pa... 12 mv/pa...15 mv/pa... 15 mv/pa... 14 mv/pa... 10 mv/pa Rated impedance... 50 ohms... 50 ohms... 50 ohms... 50 ohms... 50 ohms... 50 ohms... 50 ohms Rated load impedance... 1000 ohms... 1000 ohms... 1000 ohms... 1000 ohms... 1000 ohms... 1000 ohms... 1000 ohms Signal-to-noise ratio CCIR 1) (rel. 94 db SPL)... 68 db... 67 db... 69 db... 69 db... 69 db... 68 db... 67 db A-weighted 1) (rel. 94 db SPL)... 76.5 db... 78 db...78 db... 78 db... 78 db... 77 db... 76 db Equivalent noise level, CCIR 1)... 26 db... 27 db... 25 db... 25 db... 25 db... 26 db... 27 db Equivalent noise level, A-weighted 1)... 17.5 db-a... 16 db-a... 16 db-a... 16 db-a... 16 db-a... 17 db-a... 18 db-a Maximum SPL for THD 0.5% 2)... 140 db... 140 db... 140 db... 138 db... 138 db... 138 db... 142 db for THD 0.5% with preatt 2)... 150 db... 150 db... 150 db... 148 db... 148 db... 148 db... 152 db Maximum output voltage... 10 dbu... 10 dbu... 10 dbu... 10 dbu... 10 dbu... 10 dbu... 10 dbu Dynamic range of the mic amp (A-weighted)... 122.5 db... 124 db... 124 db... 122 db... 122 db... 121 db... 124 db Supply voltage (P48, IEC 61938)... 48 V ± 4 V... 48 V ± 4 V... 48 V ± 4 V... 48 V ± 4 V... 48 V ± 4 V... 48 V ± 4 V... 48 V ± 4 V Current consumption (P48, IEC 61938)... 2 ma... 2 ma... 2 ma... 2 ma... 2 ma... 2 ma... 2 ma Matching connector... XLR3F... XLR3F... XLR3F... XLR3F... XLR3F... XLR3F... XLR3F Weight... 102 g... 80 g... 80 g... 80 g... 80 g... 80 g...80 g Diameter... 24/22 mm... 22 mm... 22 mm... 22 mm... 22 mm... 22 mm... 22 mm Length... 110 mm... 92 mm... 92 mm... 92 mm... 92 mm... 92 mm... 92 mm 1) according to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS 2) measured as equivalent el. input signal
Errors excepted, subject to changes Printed in Germany Publ. 01/08 058160/A05 Neumann is a registered trademark of the Georg Neumann GmbH in certain countries.